Four-wheel radial truck



July 28, 1931. M. RIVKIN FOUR-WHEEL RADiAL TRUCK 2 Sheets-Sheet Filed June 20, 1930 July 28, '1931 M. RIVKIN 1,816,746

FOUR WHEEL RADIAL TRUCK Filed June 20, 1950 2 Sheets-Sheet 2 Patented July 28, 1931 it I v 1 ,8 1

UNITED STATES PATENT OFF-ice MENAHEM RIVKIN, OF PHILAIjELPI-IIA, PENNSYLVANTA noon-WHEEL RADIAL TRUCK Application filed June 20, 1930. Serial No. 462,609.

My invention relates to certain improvetruck is a cross-tie 7 which has a center pin ments in four-Wheel rear trucks for locomobearing 8 and two upright projections 9 tives. The invention is particularly used which fit the radial slot 10 formed in the in connection with the rear end frame as extension 11 of the main frame 12 ofthe loshown in a companion application, Serial No. comotive. This frame is shown indotted 55 462,009,1iled June 18, 1930. lines inF igs.,1 and 2 and in full lines in One object of this invention is to improve F i The particular" construction oftlii's the construction of a radial swing truck by frame is set forthin a pending application, which it can be adapted to the frame de- Serial No.462,009, fi1edJune 18,1930.

f scribed in the above-mentioned application The projections 9 are-recessed as shown in 60 and which will be guided by radial rails on F 3 toreee'ive the short shafts 13011 which the'frame, with a radius taken from the point are mounted the rollers 14 which hear'ag'ainst t hi h th t k i i t d t th mai the underside of the rails15 and form an inf a 'tegrai part of the center cross-tie 7. The

715 A further object of the invention is to so radial slot in the frame: is taken fromthe 5 design the truck that the weight of the rear point 00, Fig. 2, which is thepivot-point of the end of the locomotive is received at a central truck. Pivoted to the frame of the truck is radial line. a draw ba r16; This draw bar extends to The invention also relates to certain details the rear end ofthe locomotive and is co'u pled 29 of construction which will be fully described to the tender. The draw baris also set forth 10 hereinafter. and claimed ina separate application. filed In the accompanying drawings: June 1930 under Serial N0.v 45623610.

Figure 1 is a side view of the improved This draw bar ismounted onthe s'ame'pivotl 'l four-wheel truck, the main frame of the 10- as the truck has an opening for the pivot romotive being shown in dotted lines; pin 18 which extends through the pivotpin 15 Fig. 2 is a plan view of the truck, showing bearing 8 of the truck. v the axle and wheels in dotted lines and the In somev instances the pivot bea'ri ng 5*0fi engine frame in dotted lines; the truck may be omitted. In this case the Fig. 3 is a sectional view on the line 33, truck will depend: uponthe draw" bar for Fig. 2, showing centering devices, with the radial movment. I 90 engine frame in full lines; In Figs. 6 and 7 pini'ons 14a" areshown Fig. 4 is a sectional view on the line H, addition'to the rollers; These pinions niesh Fig. 2; with racks15a on the underside ofthe frame Fig. 5 is a sectional View on the line 5-5, 1'1. ofthetruck. In some instances the'rol lersv Fig. 3; may be dispensed with and slide ways 1456 Figs. 6 and 7 are views of a modification may be formed on the trucli which slide showing a rack and pinion in combination under the portions 156 of the frame; with the rollers; and In order to center the truck afterit has Fig. 8 is a modification of a view illustratpassed a curve;a=ny' suita b'le centering" device ing a slide as a substitute for the rollers. may be used. In" 3 I have shown one 1 is the frame of the truck, which is made formof center ng device consisting-"of rodsin the present instance as an integral struc- 19 pivoted at 20to' the projecting portions 9 ture having side members 22, a member 3 of the truck frame. Each rod 19 passes: at one end of the truck, a member 4 at the through an opening 21 in the extension 1 1 5 opposite end of the truck forming a radius of the frame 12 and through an opening in' bar, a pivot pin bearing 5, and a reinforcing the plate 35' secured to the-outside of the transverse member 6. The side members 22 socket 23 of 'thefram'e 11 and mounted on are in the form of inverted channels and each ro'djis a s iral spring'22' which is-l'e these channels are open at the top above the outed within a socket 23' 9f the extension 1 1, equalizing springs. At the center of the so that after the truck, passes around the 'be mounted on the rear end 3 truck and extending curve these springs tend to center the truck. The equalizing mechanism on each side of the truck is located within the sidemembers 2 of the frame of the truck. Springs 24-24a extend over the pedestal openings and rest upon the boxes 25 of the axles 26. 27 is an equalizing leved pivoted to the center of the frame at 28. One arm of each equalizing lever is connect d by a link 29 to one end of each spring 2a-24a. The other end of the spring 24 is connected by a link 30 to a lever 31, which is pivoted at 32 to the frame and each of these levers is arranged diagonally as shown and connected by. a link 33 to the main equalizing mechanism of th locomotive. The rear end of the spring 24a is connected by a link 3a to the main frame of the truck. a r 7 While I have shown the'proj ection 8 on the cross-tie 7 in some instances the cross-tie 7' may be omitted and the projection may of the truck frame,and in this construction it will be understood that the radial slideway of the extension of the main frame would have to be moved so as to be above the rear end frame of the truck. I

I claim:

1. The combination in a four-wheel radial truck for a locomotive, of an integral main frame consisting of two side frames; and a rear end frame and a forward frame having a bearing for a pivot pin by whichit is connected to the main frame of the locomotive, the truck having a central projection ar-' ranged to be connected to a draw'bar pivoted to the main frame and extending to the rear of the locomotive.

2. The combination in a four-wheel radial locomotive truck, of a main frame having side members and end members, one of said end members forming a radius bar by which the truck ispivoted to the main frame of the locomotive; an integral cross-tie, said crosstie having projections arranged to extend into a radial slot in the main frame and having a central projection arranged to be adapted to a draw bar mounted on the same pivot as the to the rear end of the locomotive. a

3. The combination in a four-wheel radial locomotive truck, of an integral main frame having channeled side bars and end crossbars; one of said cross-bars being in the form of a radius bar and having a pivot pin opening a cross-tie at the center of the truck; projections on the cross-tie adapted to slide in a segmentalslot in the frame; and equalizing mechanism located within the channels of the side frame and connected to the main equalizing mechanism of the locomotive.

4%. The combination in a four-Wheel radial locomotive truck, of an integral main frame consisting of side members and end members, one ofwhich is in the form of a radius bar a cross-tie extending from one side member to the other; a center pin bearing on the crosstie arranged to be engaged by a draw bar,

and a projection on each side of the center pin bearing arranged to extend into a radial slot in the main frame of the locomotive; and rollers carried by said projections and arranged to travel under the frame. Y

5. The combination in a four-wheel radial locomotive truck, of an integral main frame cosisting of side members and end members, one of which is in the form of a radius bar; a cross-tie extending from one side member to the other; a center pin bearing on the crosstie arranged to be engaged by a draw bar; a projection on each side of the center pin bearing arranged slot in the main frame of the locomotive rollers carried by said projections and arranged to travel under the frame; and centering mechanism adapted to said projections and extending through openings in frame of the locomotive.

6. The combination in the main frame of a locomotive having a radial slot taken fromthe pivot pin on the frame, of a truck mounted under the frame and pivoted at the abovementioned point to the frame, and having projections extending into the radial slot; rollers on the truck arranged to travel under the frame at each side of the slot; racks on the main frame of the locomotive; and pinions adjoining the rollers and arranged to mesh with the racks.

MENAHEM RIVKIN.

to extend into a radial the main 

